Low-complexity enhancment video coding using tile-level quantization parameters

An apparatus to decode video data, the apparatus comprising:

• memory;
• instructions;
• and
• at least one processor circuit to be programmed based on the instructions to:
• identify a bitstream from a device, the bitstream including a first layer encoded using a base encoder and enhancement layers encoded using low-complexity enhancement video coding (LCEVC);
• decode a first video frame of the first layer of the bitstream using a base decoder;
• up-sample the decoded first video frame;
• identify a first quantization parameter of a first tile of the first video frame encoded using a first enhancement layer of the enhancement layers;
• identify a second quantization parameter of a second tile of the first video frame encoded using the first enhancement layer, the second quantization parameter different than the first quantization parameter;
• decode, based on the first quantization parameter and the second quantization parameter, the first video frame encoded using the first enhancement layer;
• generate a first combined intermediate video frame based on the up-sampled first video frame and the decoded first video frame encoded using the first enhancement layer;
• up-sample the first combined intermediate video frame;
• decode the first video frame encoded using a second enhancement layer of the enhancement layers;
• generate a second combined intermediate video frame based on the decoded first video frame encoded using the second enhancement layer and a reference frame;
• and
• generate a combined output video frame based on the first combined intermediate video frame and the second combined intermediate video frame.

A non-transitory computer-readable storage medium comprising instructions to cause at least one processor circuit to at least:

• identify a bitstream from a device, the bitstream including a first layer encoded using a base encoder and enhancement layers encoded using low-complexity enhancement video coding (LCEVC);
• decode a first video frame of the first layer of the bitstream using a base decoder;
• up-sample the decoded first video frame;
• identify a first quantization parameter of a first tile of the first video frame encoded using a first enhancement layer of the enhancement layers;
• identify a second quantization parameter of a second tile of the first video frame encoded using the first enhancement layer, the second quantization parameter different than the first quantization parameter;
• decode, based on the first quantization parameter and the second quantization parameter, the first video frame encoded using the first enhancement layer;
• generate a first combined intermediate video frame based on the up-sampled first video frame and the decoded first video frame encoded using the first enhancement layer;
• up-sample the first combined intermediate video frame;
• decode the first video frame encoded using a second enhancement layer of the enhancement layers;
• generate a second combined intermediate video frame based on the decoded first video frame encoded using the second enhancement layer and a reference frame;
• and
• generate a combined output video frame based on the first combined intermediate video frame and the second combined intermediate video frame.

A method for decoding video data, the method comprising:

• identifying, by at least one processor circuit of a first device, a bitstream from a second device, the bitstream including a first layer encoded using a base encoder and enhancement layers encoded using low-complexity enhancement video coding (LCEVC);
• decoding, by one or more of the at least one processor circuit, a first video frame of the first layer of the bitstream using a base decoder;
• up-sampling, by one or more of the at least one processor circuit, the decoded first video frame;
• identifying, by one or more of the at least one processor circuit, a first quantization parameter of a first tile of the first video frame encoded using a first enhancement layer of the enhancement layers;
• identifying, by one or more of the at least one processor circuit, a second quantization parameter of a second tile of the first video frame encoded using the first enhancement layer, the second quantization parameter different than the first quantization parameter;
• decoding, by one or more of the at least one processor circuit, based on the first quantization parameter and the second quantization parameter, the first video frame encoded using the first enhancement layer;
• generating, by one or more of the at least one processor circuit, a first combined intermediate video frame based on the up-sampled first video frame and the decoded first video frame encoded using the first enhancement layer;
• up-sampling, by one or more of the at least one processor circuit, the first combined intermediate video frame;
• decoding, by one or more of the at least one processor circuit, the first video frame encoded using a second enhancement layer of the enhancement layers;
• generating, by one or more of the at least one processor circuit, a second combined intermediate video frame based on the decoded first video frame encoded using the second enhancement layer and a reference frame;
• and
• generating, by one or more of the at least one processor circuit, a combined output video frame based on the first combined intermediate video frame and the second combined intermediate video frame.